COUPLE OPEN TO “TRYING NEW THINGS”, BF SAYS HE WANTS TO SMELL GF’S UNDERWEAR

My bf told me he wants to try and smell my underwear.

Basically what the title says. Me (23) and my bf (23) are really open to trying new things and we‘re never judging each other when doing so.

I started joking around lately with throwing my panties in his direction when I was about to take a shower or giving him my underwear when we‘re doing laundry to have him „something to look at“.

Yesterday he told me he always really needs to fight the urge to just smell them. And when I told him he could just do it and I don’t think that‘s strange he kind of hesitated. So I really want him to do so if he likes. Here‘s my question(s).

1. Do men like the smell in general or is it kind of a „fetish“ thing?
2. Do I have to care about being ultra clean Or is it okay if I just give him my worn undies after the day if he wants them?
3. I‘m really insecure about my private parts in general when he‘s eating me out or just looking at them, thinking maybe he doesn’t like the look of it. I‘m really new to this so I want it to be enjoyable and a happy experience for him.

Any advice is really welcome! <3